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<p><em>Examples &gt; Strings</em>
</p>
<p class='vspace'></p><h3>String Replace Function</h3>
<p>The String <a href='StringReplace.html'>replace</a>() function allows you to replace all instances of a given character with another character. You can also use replace to replace substrings of a string with a different substring.
</p>
<h3>Relevant Groundwork</h3>
<p>None
</p>
<h3>Hardware Required</h3>
<ul>
<li>MSP-EXP430G2 LaunchPad</li>
</ul>
<h3>Circuit</h3>
<p>Only LaunchPad is required for this example.
</p>
<img height='250px' src='../reference/img/Blink_bb.png' alt='' title='' />
<p>image developed using <a href='http://fritzing.org'>Fritzing</a>. For more circuit examples, see the <a href='http://fritzing.org/projects'>Fritzing project page</a>.
</p>
<h3>Schematic</h3>
<img height='400px' src='../reference/img/Blink_schem.png' alt='' title='' />
<h3>Code Explanation</h3>
<p><strong>Caution:</strong> If you try to replace a substring that's more than the whole string itself, nothing will be replaced. For example:.
</p><p class='vspace'></p>
<pre>
  String stringOne = "dog";
  String stringTwo = stringOne.replace("twodogs", "Blah");
</pre><p class='vspace'></p>
<p>In this case, the code will compile, but stringOne will remain unchanged, since the replacement substring is more than the String itself.
</p>
<h3>Code</h3>
<pre>
/*
  String replace()
 
 Examples of how to replace characters or substrings of a string
 
 created 27 July 2010
 modified 2 Apr 2012
 by Tom Igoe
 
 This example code is in the public domain. 
 */

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);

  // send an intro:
  Serial.println("\n\nString  replace:\n");
  Serial.println();
}

void loop() {
  String stringOne = "&ltHTML&gt&ltHEAD&gt&ltBODY&gt"";
  Serial.println(stringOne);
  // replace() changes all instances of one substring with another:
  // first, make a copy of th original string:
  String stringTwo = stringOne;
  // then perform the replacements:
  stringTwo.replace("<", "&lt/");
  // print the original:
  Serial.println("Original string: " + stringOne);
  // and print the modified string:
  Serial.println("Modified string: " + stringTwo);

  // you can also use replace() on single characters:
  String normalString = "bookkeeper";
  Serial.println("normal: " + normalString);
  String leetString = normalString;
  leetString.replace('o', '0');
  leetString.replace('e', '3');
  Serial.println("l33tspeak: " + leetString);

  // do nothing while true:
  while(true);
}
</pre>
<h3>Working Video</h3>
(Insert Video Here)
<h3>Try it out:</h3>
<p>- Replace all the nouns in a string with funny names
</p>
<p class='vspace'></p><p><strong>See Also</strong>
</p><ul><li><a class='wikilink' href='Setup.html'>setup</a>()
</li><li><a class='wikilink' href='Loop.html'>loop</a>()
</li><li><a class='wikilink' href='Serial_Println.html'>println</a>()
</li></ul>

<p class='vspace'></p><p><a class='wikilink' href='Guide_index.html'>Getting Started Home</a>
</p>
<p class='vspace'></p><p><em>Corrections, suggestions, and new documentation should be posted to the <a class='urllink' href='http://forum.43oh.com/forum/28-energia/' rel='nofollow'>Forum</a>.</em>
</p>
<p class='vspace'></p><p>The text of the Energia reference is licensed under a
<a class='urllink' href='http://creativecommons.org/licenses/by-sa/3.0/' rel='nofollow'>Creative Commons Attribution-ShareAlike 3.0 License</a>.  Energia reference is based on the Arduino reference. Code samples in the reference are released into the public domain.
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